Work

Collision operator for electron runaway in cold weakly ionised plasmas

Year: 2026

Type: article

Abstract: In cold weakly ionised plasmas, the Dreicer generation mechanism can be non-diffusive as demonstrated in a recent study. By expanding the previous letter, we present the detailed description of a proper collision operator to precisely account for the non-diffusive electron kinetics. The operator appropriately combines the Fokker–Planck operator and Boltzmann operator where free-bound collision cross-sections are valid in the low-energy region. The proposed operator is envisaged to predict runaway electron generation in cold weakly ionised plasmas, particularly to design a runaway-free reactor tokamak start-up.

Source: Journal of Plasma Physics

DOI: 10.1017/s0022377826101329

Authors: Yeongsun Lee, Pavel Aleynikov, Peter de Vries, Jong-Kyu Park, Yong-Su Na

Institutions: Seoul National University, Max Planck Society, Max Planck Institute for Plasma Physics, ITER, Princeton Plasma Physics Laboratory

Language: English

Topic: Magnetic confinement fusion research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,550